X-Git-Url: https://git.rrq.au/?a=blobdiff_plain;f=stack.asm;h=d86727680763c9e93b6c691a361b3657baeb4e88;hb=1650b06e609ebb40a1fcd3df54a3147f41f42138;hp=9726cc2b8eb2883c2e4df7ad4e2a0f7272427b27;hpb=f3bc3b97f37dd7bc012c152374d4185c734b3a7e;p=rrq%2Frrqforth.git

diff --git a/stack.asm b/stack.asm
index 9726cc2..d867276 100644
--- a/stack.asm
+++ b/stack.asm
@@ -1,5 +1,14 @@
 ;;; Words for stack manipulations
 	
+	WORD p_depth,'DEPTH',fasm
+	;; ( -- v )
+	;; Push stack depth (before push)
+	lea rax,[DS_TOP]
+	sub rax,rsp
+	shr rax,3
+	push rax
+	next
+
 	WORD p_dup, 'DUP',fasm
 	;; ( v -- v v )
 	;; Duplicate top ov stack value.
@@ -110,12 +119,35 @@ p_roll_eq:
 	push qword [rsp+rax]
 	next
 
-	WORD w6.2.2300, 'TUCK',fasm
+	WORD p_tuck, 'TUCK',fasm
 	;; ( x1 x2 -- x2 x1 x2 )
-	;; insert the top stack value into below second stack value.
+	;; copy the top stack value into below second stack value.
 	pop rax
 	pop rbx
 	push rax
 	push rbx
 	push rax
 	next
+
+;;; ========================================
+;;; Return stack operations
+
+	WORD p_gtR, '>R',fasm
+	;; ( x -- ) ( R: -- x )
+	;; Move x to the return stack.
+	pop rax
+	pushr rax
+	next
+
+	WORD p_Rgt, 'R>',fasm
+	;; ( -- x ) ( R: x -- )
+	;; Move x from the return stack to the data stack.
+	popr rax
+	push rax
+	next
+
+	WORD p_Rget, 'R@',fasm
+	;; ( -- x ) ( R: x -- x )
+	;; Copy x from the return stack to the data stack.
+	push qword [rbp]
+	next